Post crane



septn 1,1925. 1,551,768 v 5. OTlS POST CRANE Filcd Oct. 2, 1922 2 Sheng-Sheet 1 1,551,768 S. OTIS POST CRANE Filed'Oct. 2, 1922 2 Sheets-Sheet 2 EVD Sem.v 1. 1,925

' To. .faZZ' whom iz't may' concer/n:

Patented Sept. 1, 1925.

@STAT-E5 SPENCER oTIs, or BAARRINGTON, ILLINOIS.

l ros'r CRANE.

aspiration' me@ comer 72, 1922. serialKV No.5. 591,822. j

'Belitvknow'n that 1,1SrENoER Oris, a citizen-v of the United jStates, 1 residing ati Barringtonfin the. county of .Cook and' State of Illinois, have invented certain new v'and-"Buseful'lmprovements in Post Cranes, oWhich the follow-ing yisa specification. 1

`Jhis/invention relates *to4 jk'b cranes adapted tofbe mounted' with horizontal lswinging movement upon stationary pillars or studs in existing structures or uponspecially provided kstationary posts. Y

One .object of theinvention is to pro-vide antimproved construction .of jib crane in which" the sustaining structure and mountings Aareslocated at or below the jib level. in orderthatl fthe' jib canfbe positioned high on.` the supporting postwith consequent increasein itsverticalrange of action and clearance ofiobstructions vaccordingly, one feature consists in locatinga diagonal compression stay beneath 5a substantially horizontal jib, .and connecting together the inner end ofthe fjib and the lowery endof this stay through means of a `substantially -vertical:` tension member in amanner to -form a rigid triangular truss of such integrity as willipermit `it to :be sustained vertically, throughithe lower endo-fits stay upon an annular step provided upon the stationary post, and horizontally sustained through its jib, 1 which vconstitutes the i yupper^horizontal Y leg of'thetriangularntrusaby means of a strap .revolubly embracing the .y post on `a levelfwith'the'jib. f

. A furtherobject is'to provide; means for leveling the jibsinthestructure above Vdescribedv to better adapt :it: to serve as a trolley itrack. Accordingly, another .fea-ture consiSts-in extendingtheends of the kstrap parallel [with the jibsand anchoring them to the crane through the medium of dra-W bolts, Yand :securing-the outer endsV of these draw boltsbynuts so thatby changing' the lengthof the drawvbolts the vangle of the craneandj consequently` thei level .of the. jib, canbefdetermi-ned. at will. y

Aizfurther ,Objectis to. provide a cheapV and readily available. construction of 'shouldered post :upon/Which to mount a j-ib crane of.' the kindv referred tOTand'also-.a cheap and drurableilconstruction tof roller foot through which the: crane. bears :and travels. .upon the shoulder. Accordingly, another feature of the inventionconsists in building up the stationary Vpost'rfor `a trussed jib crane, out of an inner core lor body-timber surrounded' by a group VoiA reinforcing timbers, which latter terminate in position to-form an offsety or'shoulder to receive the lower end of Vthe crane,and have their ends turned or dressed to form' an annular step therefor.

In the accompanying drawings, in which two embodiments oic shown by `Way of'illustratioirv Figures 1 and 2 arc, respectively, a side elevation anda top plan view of an embodiment in which the foot ofthe crane is equippedwith special shoes bearing rustoconicalV rollers which traverse an annular step provided by a specially constructed collarupon the Vstationary post; and Figure 3 is -a section on the line 3X`-3" of Figure 1.

Figure l is -a view similar to Figure 1 showing a modified construction of stationary v'post and of the bearing shoe through which rthe crane rests thereon.

Figure 5'is a section on the line x-x of Figure 4; and

Figure 6 is a section on the line (SX--X of Figure 4:. y

Referring to Figures 1, 2, and 3, 1 represents a stationarypost forming part of a building structure, or provided specially therein, havingits lower end iixed in masonry at 2 and its upper end united through the invention `are flange coupling 3 with a girder, beam, or

other available vmember 4. Located upon the post 1 is a collar 5 constructed with annular beveled step 6 sustained by webs 7 8 represents a crane jib sustained vertically by apair of diagonal stays 9 and held against tipping. relatively to 4said stays ley-means of tension members-10 united to the inner-end of said jib andto the lower` ends of said stays. yMounted at the lower endso-fthefstays 9 is a rollerv foot 11 in these channels are united at top by means otra plate 2() secured thereto by rivets 2l. The stays 9 are riveted to the respective membersy 8a' with intervening reinforce plates 22. rI`he inner ends of the jib members 3a are united by an outer channel piece 23 iand an inner angle piece 24. Vertical tension members l are secured to the jlb members 3a through the medium of said channel piece and angle piece, and the connection is reinforced by an anale piece 25.

y Strap 13, while held firmly against vertical and transverse displacement relatively to the liib 8, is movable longitudinally thereon in order to permit of take up through the rods l5 and nuts 19; and to this end.

the strap is secured 'tothe jib by means ot clips 2o and by a plate 2T, which latter is connected by bolts 28 with the channel piece 23 and angle piece Eel without passing through the strap.V rhe spaced channel members 8 of the jib yolred together at their inner ends by the transverse channel piece 23 and at their intermediate portions by means oi" the transverse yoke 18, and the similar dual construction ot' the stays, consisting ot the diagonal compression members 9 spaced apart at their upper ends by attachment to the jib members 8 beneath the yoke 13 and at their lower ends by means of the roller toot 1l, which constitutes a load transmitting` yoke tor the stays and which carries the spaced conical rollers l2 presented radially to the conical step 6, cooperate to provide a very stable but light and cheaply .y fabricated structure.

In order to mount the water, steam, air, or other pipe upon the post l, said post is provided with a tubular conduit 29 extending :from a point above the strap 13 to a Y point below the collar 5, and having its ends welded in the wall of the post so that a pipe, such as that illustrated at 30, can be readily driven through the conduit withoutintert'ering with the horizontal swinging of' the crane and have its ends suitably connectreinforcing portion being turned or dressed at an intermediate point in order to provide an annular beveled step 6a.

The crane in Figure 4 is constructed substantially as in Figure l, and the description and reference characters ot Figure l will apply thereto, except that its lower end or loot instead of being equipped with caster rollers secured to the stays by shoes, has a wooden block 37 secured between the stays 9 and constructed with a bearing end 3.7 conforming to the step 5 which sustains the vertical load ot the crane while permitting it freedom ot horizontal swinging. In both Figures land il, an additional strap 38 is preferably employed to resist displacement of the lower end ot the crane, and this strap is preferably attached to tension members l0. llreterably, the flange coupling between the post and the timber 4 is braced by struts 39 inserted between it and inset blocks 40, and also by guy rods 4l.

I claim:

l. In a crane, a jib, a strap at the inner end of said jib, adapted to surround a post, and having its ends extending outwardly in the direction ot the length of the jib and conlined against transverse movement relative to the jib, but movable in said direction, and tie rods connected with the ends ot said strap and adjustably anchored on the crane.

2. In a crane, a jib, a substantially U- shaped strap at the inner end of the jib adapted to surround a post and having ends extending in the longitudinal direction ol and overlapping said jib, means securing the ends ot the strap to the jib with movement in said longitudinal direction, tie rods connected with said strap ends, an anchorage for saidtie rods on the crane, and means for adjusting the tie rods in their said anchorage.

3. In a crane, a jib comprising a pair of substantially horizontal spaced members, a transverse yoke uniting said members, stays extending from said yoke downwardly and inwardly to a point beneath the inner end ot' the jib, a strap mounted on the inner end of the jib adapted to connect it revolubly with the post, means adjustably connecting the strap with said yoke, tension members connecting` the inner ends ot the jib members with the lower ends of the stays, and means carried by the lower ends of the stays for vertically supporting the crane.

4t. In a crane, a jib, comprising a pair of substantially horizontal spaced members, a strap, adapted to engage a crane-supporting post, having its ends extending in substantial parallelism with said spaced jib mem'- bers and secured to the jib, a yoke secured transversely to said jib members at a point remote from the strap, said .yoke spacing said jib members apart, a pair ot stay members having their upper ends secured to said llO jib members adjacent to said yoke and mitting yoke in substantial continuation of spaced apart thereby and extending doWnthe respective stay members and spaced Wardly and inwardly therefrom, a roller apart thereby in positions to rest upon a 10 foot secured to and spacing `apart the lower vertical support.

ends of said stay members and providing p Signed at Chicago, Iliinois, this 26th day a load transmitting yoke therefor, and of Sept., 1922. bearing rollers mounted on said load trans- SPENCER OTIS. 

